Use Your Old Smartphone As A Free Web Server

There are all sorts of free web server apps, which are useful for hosting your own website from home without having to pay anything. Of course, you are limited to the resources your old smartphone has, but there is a surprising amount of services you can provide even without a lot of storage, such as a PHP server, a SQL database server, an FTP server, and even an ssh server. This can prove to be very powerful if done right!